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我县■陕西省关中平原地区,位于泾惠渠上游,泾河流经县境南部,横贯东西。泾惠渠已开灌廿多年,由于旧社会的长期大畦漫灌,加之缺乏排洩措施,每年引入地区的灌溉水超过了农作物叶面和地面蒸发,地下水位上升,造成部分地区沼泽化和盐渍化。低洼棉田经常尺盐,表土含盐量高达0.47%,因此出苗困难,作物生长发育不良,产量既低而不稳定,一般干旱年份棉花及一般农作物减产30至50%,在部分严重地区根本就不能生长棉花,棉花产量逐步下降,土壤变环。1956年调查统计全县
My county ■ Guanzhong Plain in Shaanxi Province, located in Jing Huiqu upstream, Jing River flows through the county south, across things. Jinghuiqu has been cultivated for more than 20 years. Due to the long-term flood irrigation in the old society and the lack of drainage measures, the irrigation water introduced into the area each year exceeds the foliage and surface evaporation of crops and the groundwater table rises, resulting in swamping and salting in some areas The Low-lying cotton fields often have salt feet and top soil salt content is as high as 0.47%. Therefore, emergence difficulties, poor crop growth and development, low and unstable yields, 30 to 50% reduction in cotton and general crops in general drought years and no improvement in some serious areas Growing cotton, cotton production decreased gradually, soil circulation. 1956 survey statistics county